Set AST source on compile.

CHANGELOG.md

@@ -64,6 +64,7 @@ Enhancements
 * `Scope::remove` is added to remove a variable from a `Scope`, returning its value.
 * The code base is cleaner by running it through Clippy.
 * `ParseError::err_type` and `ParseError::position` are added for convenience.
+* The source of an `AST` compiled from a script file is set to the file's path.
 
 
 Version 1.8.0

src/api/files.rs

@@ -106,7 +106,11 @@ impl Engine {
     /// ```
     #[inline]
     pub fn compile_file_with_scope(&self, scope: &Scope, path: PathBuf) -> RhaiResultOf<AST> {
-        Self::read_file(path).and_then(|contents| Ok(self.compile_with_scope(scope, &contents)?))
+        Self::read_file(&path).and_then(|contents| {
+            let mut ast = self.compile_with_scope(scope, &contents)?;
+            ast.set_source(path.to_string_lossy());
+            Ok(ast)
+        })
     }
     /// Evaluate a script file, returning the result value or an error.
     ///